Characterization of Gamma-Ray Irradiation Influence on the Corrosion Behaviour of Austenitic Stainless Steel

Date

2020-05-19

Advisors

Journal Title

Journal ISSN

ISSN

Volume Title

Publisher

Elsevier

Type

Article

Peer reviewed

Yes

Abstract

This study investigates the effect of gamma irradiation on the corrosion behavior of austenitic stainless steel type AISI 304. Gamma-ray type 60Co gamma was used and three different of gamma radiation were applied on the samples: 75, 150 and 250 kGy. Different electrochemical corrosion tests were applied to measure the potentiodynamic polarization and plotting the electrochemical impedance spectroscopy. The results showed that the gamma radiation with doses 150 and 250 kGy increased the corrosion resistance, e.g. higher corrosion potential and less current density, however, the dose of 75kGy reduced the corrosion resistance, and local corrosion was observed on the irradiated samples. These results are attributed to the change in the chemical composition on the surface due to the irradiation. Elements such as chromium and oxygen are increased on the surface of high irradiated samples which led to enhancing the corrosion resistance, while impurities and ions of Cu, Zn, Cl and Na appeared on 75 kGy irradiated sample and led to localized corrosion.

Description

The file attached to this record is the author's final peer reviewed version. The Publisher's final version can be found by following the DOI link.

Keywords

Gamma radiation, stainless steel, corrosion, cyclic potentiodynamic polarization, electrochemical impedance spectroscopy, x-ray photoelectron spectroscopy

Citation

Aljohani, T. et al. (2020) Characterization of Gamma-Ray Irradiation Influence on the Corrosion Behaviour of Austenitic Stainless Steel. Materials Today Communications, 24, 101242

Rights

Research Institute

Institute of Engineering Sciences (IES)